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Error code reference

Bosch Refrigerator Error Code 1001

Inverter error

Bosch codesBosch refrigerator codes

Inverter error: Power stage short circuit

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The complete diagnostic procedure includes additional test steps, resistance specifications, wiring diagram references, and component test points.

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What 1001 means on a Bosch refrigerator

Error code 1001 on a Bosch refrigerator indicates an inverter error caused by a power stage short circuit. The inverter board controls the variable-speed compressor motor by converting DC power into a precisely modulated AC signal. When the power stage within the inverter experiences a short circuit, the board loses its ability to regulate compressor operation, triggering this fault code and typically shutting down the compressor to prevent further damage.

A power stage short circuit can originate from several sources: a failed IGBT (insulated gate bipolar transistor) or MOSFET switching component on the inverter board, a direct short within the compressor motor windings that feeds destructive feedback into the inverter, or damage to the inverter board itself from voltage spikes, moisture intrusion, or heat stress. Because the inverter and compressor are electrically coupled, failure in either component can produce this same code.

The primary diagnostic action for this fault is replacing the inverter board. Before doing so, a technician should inspect the compressor wiring harness for chafing or pinched conductors and check for signs of burning or component damage on the inverter board itself. If a new inverter board triggers the same fault shortly after installation, the compressor motor windings should be tested for shorts to ground, as a failed compressor can destroy a replacement inverter board.

Source: manufacturer service documentation.

Common causes of 1001

  1. 01

    Failed inverter board power stage

    Part replacement

    Internal switching components on the inverter board have shorted, which is the most direct cause of this fault. Visual signs may include burn marks, swollen capacitors, or a burnt odor on the board.

  2. 02

    Shorted compressor motor windings

    Part replacement

    A short circuit within the compressor motor windings can send damaging feedback current into the inverter, triggering the power stage fault. This can also destroy replacement inverter boards if not identified before reinstallation.

  3. 03

    Damaged wiring harness between inverter and compressor

    Wiring / connection

    Chafed, pinched, or melted wiring between the inverter board and the compressor can create a short circuit path that registers as a power stage fault. Inspect the harness routing for any contact with sharp edges or heat sources.

  4. 04

    Voltage spike or power surge damage

    Part replacement

    A power surge from the supply line can destroy the inverter board's power stage components. This is more likely if the fault appeared immediately after a power outage or electrical storm.

See the test procedure for each cause

Frequently asked questions about 1001

What does 1001 mean on a Bosch refrigerator?
Error code 1001 on a Bosch refrigerator indicates an inverter error caused by a power stage short circuit. The inverter board is the component that controls the variable-speed compressor, and a short circuit within its power stage prevents normal compressor operation. This fault requires hands-on diagnosis and most likely replacement of the inverter board.
Can I fix error code 1001 on my Bosch refrigerator myself?
Replacing an inverter board involves working with high-voltage components and requires disconnecting and handling electrical assemblies near the compressor. This repair is best handled by a qualified appliance technician. A technician will also need to rule out a failed compressor before installing a new inverter board, since a shorted compressor can damage a replacement inverter quickly.
Will resetting my Bosch refrigerator clear error code 1001?
Resetting the refrigerator by unplugging it for a few minutes may temporarily clear the display, but error code 1001 reflects a hardware fault in the inverter's power stage. If the underlying short circuit condition is still present, the error will return as soon as the refrigerator attempts to run the compressor. A reset alone is not a fix for this fault.
Is error code 1001 on a Bosch refrigerator a safety concern?
A power stage short circuit in the inverter can involve high current flow and potential for localized overheating on the inverter board. While the refrigerator's control system is designed to shut down the compressor when this fault is detected, it is advisable not to ignore the fault or attempt to bypass it. If you notice a burning smell or visible scorch marks near the compressor area, unplug the refrigerator and contact a technician promptly.
How much does it cost to repair error code 1001 on a Bosch refrigerator?
Repair costs for a Bosch refrigerator inverter fault vary depending on the parts needed and labor rates in your area. Inverter board replacement typically ranges from $200 to $500 including parts and labor. If the compressor is also found to be faulty, total repair costs could range from $400 to $900 or more, depending on the specific model and compressor pricing.

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